Level.



PATENTED JULY 10, 1906.

J. L. RUSSELL.

LEVEL. APPLICATION FILED DEO.14, 1904.

Afro/mers UNITED ASTATES PATENT OFFICE.

JOHN LYTLE RUSSELL, OFSANDERSONIA, CALIFORNIA.

LEVEL.

Specification of Letters Patent.'

Patented J uly 10, 1906.

Application filed Decemberlli, 1904. Serial No. 236.841.

. siderable distances tobe determined.

` embodiment of my invention, parts bein It consists in the; various features and combinations hereinafter described and claimed.

Reference is to be had to'the accompanying drawings, forming a part of this specification, in which similarcharacters of reference indicate corresponding parts in all thegures.

Figure 1 is a broken side elevation of one in section. Fig. 2 is an enlarged central vertlcal section through one end of the tube, and Fig. 3 is a top plan view thereof.

designates a tube formed of somesuchY A ilexible materiales rubber and being of such a character as tocontainaliquid,which may be mercury, alcohol, or any other which is convenient. The opposite ends of the tube are provided with rigid transparent sections or terminals 11 11, preferably of glass. These terminalshmay be connected to thetube by enclrchng sleeves 12 and may be cemented in place, there being also shown packing-rings 1 3, resting in recesses in the sleeves, and ternunals to lnsure a Huid-tight joint. Each of the endsections has an Ilndex-Inark, this being preferably in .the form of a scale a, the z ero'of Whlch 1s situated midway of the sed'- tion, the graduatlons .extending therefrom in opposite directions. A flexibIe linear scale mayalso be carried bythe flexible tube, extending between the en d sections, as'shown After lling the level with liquid,- as indi-A cated at L, there being a suflicient amount to rise Withln the transparent sections, the an' at each end above the surface of the 1i uid is' preferably exhausted and a closure e ected,

thus preventing the esca e 0i.' the contents and its eva eration. As ere illustrated, the closure inc udes a cap 1.5, secured u on` this outer end of each of the sections an prefer- '.sponding marksv upon the'scales.

ably provided with a packin -rin 16, similar to that previously describemI. e exterlor of each cap is threaded, and upon this portion operates a screw-cap 17. In the inner cap 1s formed an o ening 18, preferably'placed ec complete the c osure,'the integrity of which may be maintained by interposed. gaskets 20.

In the use of the device one ofthe end sections is placed at the oint to which the level is to be referred. 'I 1e opposite terminal is then carried to the place at which the level is to be fixed, the length and flexibility of the tube permitting tlns and raised or lowered until the liquid at both ends stands at corre- This fixes e desired level. The scale-in connection with the tube may be employed in the ordinary way for measurin dlstancesor heights. Having thus descried my linvention, I claim as new and desire to secure Patent- 1. A level, comprising a flexible tube adapted to contain a liquid., transparent sections having scales thereon, sleeves securing the transparent sections to the ends of the flexible tube, and a flexible scale havino' its ends secured to the ends of the flexible tube by the Asaid sleeves. a p

i 2. A level, com risingaflexible tube adapted to contain a. lquid, transparent sections having scalesthereon and secured to the ends of the flexible tube, each transparentsection beingv providedfwith a small opening in` its outer end, caps mounted to turn on the outer ends of the transparent sections and provided with openings, arid a flexible scale extending between the ends of the transparent sections;

In testimony' whereof I have signed my.

name to thisspecification in the presence of two subscribing witnesses.

l V JOHN LYTLE RUSSELL. Witnessesz 'i WILLIAM- J. TURNER,

MARK W. STONE. 

